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Silver halide complexes of a borane/bis(phosphine) ligand have been prepared and characterized. With AgF, the borane abstracts fluoride, resulting in a zwitterionic complex. With AgCl, AgBr, and AgI, the halide stays coordinated to Ag, with little to no Ag–B interaction. 

A new diarylmido-based pincer proto ligand ( iPrPNHSbPh ) with one –PPr i 2 and one –SbPh 2 side donor has been synthesized. Three complexes of its amido form were prepared using standard metalation techniques: ( iPrPNSbPh ) PdCl , ( iPrPNSbPh ) RhCO , and ( iPrPNSbPh ) Ir(COE) , where COE = cis -cyclooctene. These complexes were compared with their previously reported analogs incorporating a –PPh 2 side donor in place of –SbPh 2 . The –SbPh 2 donor arm is less donating towards the metal and is less strongly trans -influencing, based on the structural and IR spectroscopic analysis of the Rh complexes. The redox potential of the Pd complexes is only marginally affected by the change from –PPh 2 to –SbPh 2 . (iPrPNSbPh)Ir(COE) proved to be a slower and less selective catalyst in the dehydrogenative borylation of terminal alkynes (DHBTA) than its –PPh 2 analog.